Forehearth

Details Forehearth Forehearth

1992-03-13

1994-07-05

Reynolds, Bruce A.

Industrial electric heating furnaces

Glass furnace device

373 29, 373 30, 373 31, 373 40, 65346, 65337, 65135, C03B 502, C03B 504

Patent

active

053274520

ABSTRACT:
A forehearth for a glass furnace comprises a trough and roof over the trough, the roof having two longitudinal ridges extending downwardly towards the surface of the glass to define three longitudinal chambers. The central chamber forms a conduit for the flow of cooling air over the central part of the stream of glass and the side chambers serve as conduits for the flow of combustion gas. Separate outlets are provided for the cooling and combustion gases and controllable dampers are provided at least on the combustion gas outlets. Balancing of the internal pressures between the three chambers can ensure that there is little or no significant mixing of the cooling air and combustion gases and accurate control of the cooling and/or heating can be obtained by control of the dampers.

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patent: 2144973 (1939-01-01), Honiss
patent: 3582310 (1971-06-01), Avery et al.
patent: 3999972 (1976-12-01), Brax
patent: 4207065 (1980-06-01), Ackermann et al.
patent: 4294603 (1981-10-01), Winzer et al.
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patent: 4552579 (1985-11-01), Blumenfeld et al.
patent: 4622059 (1986-11-01), Brown
patent: 4655812 (1987-04-01), Blumenfeld
patent: 4680051 (1987-07-01), Blumenfeld et al.
patent: 4750928 (1988-06-01), Bolin et al.

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